summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/utaddress.c
blob: 911ea8e7fe8700f451cef7b2597b82c30870ca8f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/******************************************************************************
 *
 * Module Name: utaddress - op_region address range check
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2015, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utaddress")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_add_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              address             - op_region start address
 *              length              - op_region length
 *              region_node         - op_region namespace node
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Add the Operation Region address range to the global list.
 *              The only supported Space IDs are Memory and I/O. Called when
 *              the op_region address/length operands are fully evaluated.
 *
 * MUTEX:       Locks the namespace
 *
 * NOTE: Because this interface is only called when an op_region argument
 * list is evaluated, there cannot be any duplicate region_nodes.
 * Duplicate Address/Length values are allowed, however, so that multiple
 * address conflicts can be detected.
 *
 ******************************************************************************/
acpi_status
acpi_ut_add_address_range(acpi_adr_space_type space_id,
			  acpi_physical_address address,
			  u32 length, struct acpi_namespace_node *region_node)
{
	struct acpi_address_range *range_info;
	acpi_status status;

	ACPI_FUNCTION_TRACE(ut_add_address_range);

	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	    (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Allocate/init a new info block, add it to the appropriate list */

	range_info = ACPI_ALLOCATE(sizeof(struct acpi_address_range));
	if (!range_info) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	range_info->start_address = address;
	range_info->end_address = (address + length - 1);
	range_info->region_node = region_node;

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		ACPI_FREE(range_info);
		return_ACPI_STATUS(status);
	}

	range_info->next = acpi_gbl_address_range_list[space_id];
	acpi_gbl_address_range_list[space_id] = range_info;

	ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
			  "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
			  acpi_ut_get_node_name(range_info->region_node),
			  ACPI_FORMAT_UINT64(address),
			  ACPI_FORMAT_UINT64(range_info->end_address)));

	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_remove_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              region_node         - op_region namespace node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Remove the Operation Region from the global list. The only
 *              supported Space IDs are Memory and I/O. Called when an
 *              op_region is deleted.
 *
 * MUTEX:       Assumes the namespace is locked
 *
 ******************************************************************************/

void
acpi_ut_remove_address_range(acpi_adr_space_type space_id,
			     struct acpi_namespace_node *region_node)
{
	struct acpi_address_range *range_info;
	struct acpi_address_range *prev;

	ACPI_FUNCTION_TRACE(ut_remove_address_range);

	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	    (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
		return_VOID;
	}

	/* Get the appropriate list head and check the list */

	range_info = prev = acpi_gbl_address_range_list[space_id];
	while (range_info) {
		if (range_info->region_node == region_node) {
			if (range_info == prev) {	/* Found at list head */
				acpi_gbl_address_range_list[space_id] =
				    range_info->next;
			} else {
				prev->next = range_info->next;
			}

			ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
					  "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
					  acpi_ut_get_node_name(range_info->
								region_node),
					  ACPI_FORMAT_UINT64(range_info->
							     start_address),
					  ACPI_FORMAT_UINT64(range_info->
							     end_address)));

			ACPI_FREE(range_info);
			return_VOID;
		}

		prev = range_info;
		range_info = range_info->next;
	}

	return_VOID;
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_check_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              address             - Start address
 *              length              - Length of address range
 *              warn                - TRUE if warning on overlap desired
 *
 * RETURN:      Count of the number of conflicts detected. Zero is always
 *              returned for Space IDs other than Memory or I/O.
 *
 * DESCRIPTION: Check if the input address range overlaps any of the
 *              ASL operation region address ranges. The only supported
 *              Space IDs are Memory and I/O.
 *
 * MUTEX:       Assumes the namespace is locked.
 *
 ******************************************************************************/

u32
acpi_ut_check_address_range(acpi_adr_space_type space_id,
			    acpi_physical_address address, u32 length, u8 warn)
{
	struct acpi_address_range *range_info;
	acpi_physical_address end_address;
	char *pathname;
	u32 overlap_count = 0;

	ACPI_FUNCTION_TRACE(ut_check_address_range);

	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
	    (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
		return_UINT32(0);
	}

	range_info = acpi_gbl_address_range_list[space_id];
	end_address = address + length - 1;

	/* Check entire list for all possible conflicts */

	while (range_info) {
		/*
		 * Check if the requested address/length overlaps this
		 * address range. There are four cases to consider:
		 *
		 * 1) Input address/length is contained completely in the
		 *    address range
		 * 2) Input address/length overlaps range at the range start
		 * 3) Input address/length overlaps range at the range end
		 * 4) Input address/length completely encompasses the range
		 */
		if ((address <= range_info->end_address) &&
		    (end_address >= range_info->start_address)) {

			/* Found an address range overlap */

			overlap_count++;
			if (warn) {	/* Optional warning message */
				pathname =
				    acpi_ns_get_external_pathname(range_info->
								  region_node);

				ACPI_WARNING((AE_INFO,
					      "%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)",
					      acpi_ut_get_region_name(space_id),
					      ACPI_FORMAT_UINT64(address),
					      ACPI_FORMAT_UINT64(end_address),
					      ACPI_FORMAT_UINT64(range_info->
								 start_address),
					      ACPI_FORMAT_UINT64(range_info->
								 end_address),
					      pathname));
				ACPI_FREE(pathname);
			}
		}

		range_info = range_info->next;
	}

	return_UINT32(overlap_count);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_delete_address_lists
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Delete all global address range lists (called during
 *              subsystem shutdown).
 *
 ******************************************************************************/

void acpi_ut_delete_address_lists(void)
{
	struct acpi_address_range *next;
	struct acpi_address_range *range_info;
	int i;

	/* Delete all elements in all address range lists */

	for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
		next = acpi_gbl_address_range_list[i];

		while (next) {
			range_info = next;
			next = range_info->next;
			ACPI_FREE(range_info);
		}

		acpi_gbl_address_range_list[i] = NULL;
	}
}